Most ACE Hardware stores carry Osterizer parts such as blades, collars, gaskets and carafes, but it's worth the wait for a carafe to show up at a thrift store for a fraction of what a new one would cost.
I recently picked up a yellow 4-button model 488 Osterizer "Dual Range 8" at a thrift store. It was a couple of aisles away from the other blenders and small appliances, perhaps because instead of a carafe it only had the food processor attachment. I guess it was shunned by staff that figured it wasn't a full-on blender, so it was priced at $4.99. I only wanted the attachment, but since the base unit was all metal and it was a beefy machine, I took it all home. The base cleaned up nicely.
The processor attachment doesn't hold much, but it will be a lot easier to clean than an actual mini-chopper's components. I'll be using it with my Lady Kenmore blender. I'm keeping an eye out for a carafe at the thrift stores now, and once I find one I'll be re-homing the 488 to a couple I know who are living on a shoestring. It was built to last.